"The DOJ should have let the court appreciate and weigh the evidence, determine the relevance and the authenticity of the evidence presented," he added.

Sotto said Tan's case is a "very serious and urgent matter."

His proposed solution is the merging of the Dangerous Drugs Board (DDB) and the Philippine Drugs Enforcement Agency (PDEA) into a Presidential Drug Enforcement Authority, which will attack the drug problem through a more wholistic approach.